Added support for persistent variables to the

expression parser.  It is now possible to type:

(lldb) expr int $i = 5; $i + 1
(int) 6
(lldb) expr $i + 2
(int) 7

The skeleton for automatic result variables is
also implemented.  The changes affect:

- the process, which now contains a 
  ClangPersistentVariables object that holds
  persistent variables associated with it
- the expression parser, which now uses
  the persistent variables during variable
  lookup
- TaggedASTType, where I loaded some commonly
  used tags into a header so that they are
  interchangeable between different clients of
  the class

llvm-svn: 110777

1 files changed, 8 insertions, 1 deletions

diff --git a/lldb/source/Target/Process.cpp b/lldb/source/Target/Process.cpp
index 1a1f93c2ada..3171c94652f 100644
--- a/lldb/source/Target/Process.cpp
+++ b/lldb/source/Target/Process.cpp
@@ -80,7 +80,8 @@ Process::Process(Target &target, Listener &listener) :
     m_notifications (),
     m_listener(listener),
     m_unix_signals (),
-    m_objc_object_printer(*this)
+    m_objc_object_printer(*this),
+    m_persistent_vars()
 {
     Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT);
     if (log)
@@ -1882,6 +1883,12 @@ Process::GetSP ()
     return GetTarget().GetProcessSP();
 }
 
+ClangPersistentVariables &
+Process::GetPersistentVariables()
+{
+    return m_persistent_vars;
+}
+
 ObjCObjectPrinter &
 Process::GetObjCObjectPrinter()
 {